noun
definition
The eyepiece of a microscope or other optical instrument.
definition
Any of the scales forming the margin of a reptile's eye.
adjective
definition
Of, or relating to the eye, or the sense of sight
example
It took some time after he lost his eye for him to receive his ocular prosthesis.
definition
Resembling the eye.
example
ocular markings on the wings of a butterfly
definition
Seen by, or seeing with, the eye; visual.
Examples of ocular in a Sentence
We shall, therefore, ignoring the ocular somite, speak of the first, second, third, fourth, fifth and sixth legbearing somites of the prosoma, and indicate the appendages by the Roman numerals, I, II, III, IV, V, VI, and whilst ignoring the praegenital somite we shall speak of the first, second, third, &c., somite of the mesosoma or opisthosoma (united mesosoma and metasoma) and indicate them by the Arabic numerals.
Occasionally the ocular lobes are articulated.
Usually the sides of the carapace are strangely produced into a mock rostrum in front of the ocular lobe, be it oculiferous or not.
Spiritualists have, as a rule, sought to convince not by testimony but by ocular demonstration.
One of these is the ocular segment, in front of the antennal, and behind the primitive preoral segment.
These will then remain as typically composed each of six appendage-bearing somites - the prosoma comprising in addition the ocular prosthomere.'
He endeavoured to illustrate the subject by a clavecin oculaire, or ocular harpsichord; but the treatise and the illustration were quickly forgotten.
By suitably replacing the ocular of the observing telescope in an angular vision spectroscope by a photographic camera, it is possible to photograph spectra; such instruments are termed spectrographs.
The fourth ocular result of administering atropine is the production of a slight but definite degree of local anaesthesia of the eyeball.
But the protocerebrum contains the ganglia of the ocular segment in addition to those of the procephalic lobes.
Limulus thus agrees with Scorpio and differs from the Crustacea, in which there are three prosthomeres - one ocular and two carrying palpiform appendages.
But although in such lower Crustacea the nerve-ganglia of the third prosthomere have not fused with the anterior nerve-mass, there is no question as to the prae-oral position of two appendage-bearing somites in addition to the ocular prosthomere.
If a telescope be employed there is a distinction to be observed, according as the half-covered aperture is between the eye and the ocular, or in front of the object-glass.
Again, in an ocular heliometer by Steinheil double image is similarly produced by a divided prism of total reflection placed in parallel rays.
Again, no single point in the cortex evokes the act of ocular convergence and fixation.
The drug is often replaced in ophthalmology by homatropine - an alkaloid prepared from tropine - which acts similarly to atropine but has the advantage of allowing the ocular changes to pass away in a much shorter time.
An ocular segment claimed by the former division is not present or in no case demonstrable in the latter.
The compound microscope generally consists of two positive lens systems, so arranged that the system nearer the object (termed the objective) projects a real enlarged image, which occupies the same place relatively to the second system (the eyepiece or ocular) as does the real object in the simple microscope.
An image is therefore projected by the ocular from the real magnified image produced by the objective with increased magnification.
A fine scale with known intervals is put on the stage plate, and by determining the distance between the graduations of the objective micrometer formed through the same objective, by means of the screw micrometer ocular, the magnification of the objective is determined.
As fractions of intervals can only be estimated in this method, a measurement with such an eyepiece scale can of course not be as exact as with a screw micrometer ocular.
In the case of a suitable ocular magnification, the details will be well seen, while the aberration circles remain invisible.
The magnification of a microscope is determined from the focal lengths of the two optical systems and the optical tube length, for N = 250 A/fi'f2 To determine the optical tube length 0, it is necessary to know the position of the focal planes of the objective and of the ocular.
If the object can be seen by using the mirror, the plane mirror must be used; then the actual size of the object and of the image produced by the objective is measured (of the image by a micrometer ocular).
Following our move to Devon we saw an ophthalmologist at Torbay hospital who said he thought Matthew had ocular albinism.
Living with ocular albinism Our son, Sebastian, was born in November 1992.
In suspected cranial arteritis 40 mg / or up to 80 mg/day if ocular symptoms.
Ocular lesions are common, including mild conjunctivitis, burning and grittiness.
To ' seal ' this leak, a laser is used to burn a tiny area of the ocular fundus.
Head mounted binocular indirect ophthalmoscopy Introduction Binocular indirect ophthalmoscopy (BIO) is a technique used to evaluate the entire ocular fundus.
A dangerously elevated IOP, or ocular hypertension (OHT ), is a major risk factor for glaucoma.
The ocular findings in albinism include nystagmus, decreased visual acuity; hypopigmentation of retinal tissue, and macular hypoplasia.
There are several other clinical research projects ongoing at present eg suppurative keratitis, ocular trauma, effect of cataract surgery on diabetic retinopathy.
Ocular adnexal injuries like lid lacerations occur rarely during episiotomy or with the surgical knife during delivery with cesarean section has been noted 5.
The department is also a supra-regional center for ocular oncology principally for retinoblastoma affecting children and ocular melanoma in adults.
Eyes turning opaque This sign of cat disease indicates a major ocular problem.
You will be expected to examine your fellow students, so the chances of finding ocular pathology in such a young population is low.
Ocular examination, anthropometric measurement and serum retinol analysis were carried out.
Ocular effects can result from entry of seeds into the conjunctival sac of farmers at harvest-time (Simmons 1957 ).
An epidemic of acquired systemic toxoplasmosis involving an unusually high number of cases of ocular disease occurred in 1995 in Canada.
Thus the percentage of road traffic accidents causing ocular trauma is 12.5% .
This is always available at the hospital where conditions such as recurrent uveitis, non-healing ulcers and ocular penetrating injuries are routinely seen.
The buccal mucous membrane graft is sutured to the sclera bounded by the insertion of the rectus muscles to create a new ocular surface.
Ocular effects can result from entry of seeds into the conjunctival sac of farmers at harvest-time (Simmons 1957).
Ocular toxoplasmosis associated with HIV infection is a particular challenge to the ophthalmologist.
Thus the percentage of road traffic accidents causing ocular trauma is 12.5 %.
Fortunately, cataracts can be removed and vision restored in the majority of patients if other significant ocular diseases do not exist.
Those in the jewelry business or anyone that needs to see a single piece of material up close may prefer to opt for the single ocular.
The second most common type of the condition is known as ocular albinism, in which only the eyes lack color; skin and hair are normal.
There is also a type of ocular albinism that is carried on the X chromosome and occurs almost exclusively in males because they have only one X chromosome and, therefore, no other gene for the trait to override the defective one.